Improvement in hot-air furnaces



E.. H. CAMP.

Hot-Air Furna'ces.

Patented June 23,1874.

v"No.152,274.

ATTUBNEYS.

UNITED STATES PATENT OFFICE.

EDWIIN H. CAMP, OF JACKSON, MICHIGAN.

IMPROVEMENT IN HOT-AIR FURNACES.

Specification forming part of Letters Patent No. 152,274, dated June 23,1874; application filed March 7, 1874.

To all whom it may concern:

Be it known that I, EDWIN H. CAMP, of Jackson, in the county of Jacksonand State of Michigan, have invented a new and Improved Hot-Air Furnace,of which the following is a specification:

rIhe invention will first be fully described, and then pointed out inthe claim.

Figure l is an end elevation ofmy improved furnace, and Fig. 2 is a sideelevation.

Similar letters of reference indicate corresponding parts.

A represents the fire-box, which extends horizontally whatever lengthmay be required for the capacity wanted, and is made diamond shape incross-section, a little larger one way than the other, and arranged withits greatest 1 diameter in its vertical axis. B represents flan ges inthe horizontal axis, which will, when the furnace is placed in theheating-chamber, separate the parts below from the part above, so thatthe cold air, which is rst admitted to the lower part, will all becaused to pass through the fire-chamber by the tubes C into the upperpart of the heating-chamber. D and E represent the horizontal tubes ofthe radiator in the space above the furnace. D is supported directlyover the top of the furnace by the two short rines F, discharging thesmoke and het air from the furnace into it. The tubes E are suspendedover the sides of the furnace by the middle iues G, and end ilues H. Irepresents disks on a rod, J, eX- tending along the interior of tube D,and projecting out at the front at K for a handle for working the diskswhich constitute a damper for controlling the escaping smoke, hot air,&c. Then said damper is adjusted as represented iu Fig. 2A the smokeescapes directly through lines F D, and the smoke-pipe L; but whenshifted a little to the right it passes through D, H, E, and G beforereaching the smoke-pipe, and thus heats the radiating tubes.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The combination, with radiating furnacetubes D E,connected with nre-box by dues F F, and wit-h each other by tubes Gr H,of the movable rod J K, having the disks I arranged thereon, as and forthe purpose specified.

EDWIN H. CAMP.

Vituesses:

J. C. BoUTEeoM, D. H. PERRY.

